/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import com.example.android.apis.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Part of the {@link Hover} demo activity.
 * 
 * The Interceptor view is a simple subclass of LinearLayout whose sole purpose
 * is to override {@link #onInterceptHoverEvent}. When the checkbox in the hover
 * activity is checked, the interceptor view will intercept hover events.
 * 
 * When this view intercepts hover events, its children will not receive hover
 * events. This can be useful in some cases when implementing a custom view
 * group that would like to prevent its children from being hovered under
 * certain situations. Usually such custom views will be much more interesting
 * and complex than our little Interceptor example here.
 */
public class HoverInterceptorView extends LinearLayout {
	private boolean mInterceptHover;

	public HoverInterceptorView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	@Override
	public boolean onInterceptHoverEvent(MotionEvent event) {
		if (mInterceptHover) {
			return true;
		}
		return super.onInterceptHoverEvent(event);
	}

	@Override
	public boolean onHoverEvent(MotionEvent event) {
		TextView textView = (TextView) findViewById(R.id.intercept_message);
		if (mInterceptHover
				&& event.getAction() != MotionEvent.ACTION_HOVER_EXIT) {
			textView.setText(getResources().getString(
					R.string.hover_intercept_message_intercepted));
			return true;
		}
		textView.setText(getResources().getString(
				R.string.hover_intercept_message_initial));
		return super.onHoverEvent(event);
	}

	public void setInterceptHover(boolean intercept) {
		mInterceptHover = intercept;
	}
}
